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Income Taxes - Changes in Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Balance at beginning of period $ 347 $ 393
Additions for tax positions related to the current fiscal period 155 0
Additions for tax positions related to prior years 1 32
Impact of foreign exchange fluctuation 0 (5)
Reductions related to the expiration of statutes of limitations (203) (73)
Balance at end of period $ 300 $ 347